Subscripted assignment dimension mismatch.!!!!!

hello sir i have problem with this error.I had resolved it ..it was working fine..but its again can anybody help me to solve this

        img_out(:,:,1)= gb ??? Subscripted assignment dimension mismatch.!!!!!

img_out is array which should hold gb ,gb is a image

description of image gb

    [m,n,o]= size(gb)

         m =71   n =71   o =1

>> whos gb

Name       Size            Bytes  Class     Attributes

gb        71x71            40328  double

>> ndims gb

ans =

     2

description about img_out

img_out = zeros(size(img_in,1), size(img_in,2), N); where N = 12

whos img_out Name Size Bytes Class Attributes

img_out      3x3x2              144  double

>> ndims img_out

ans =

     2
description about img_in

 whos img_in
  Name          Size              Bytes  Class    Attributes

img_in      584x565            329960  uint8              

    ndims img_in

ans =

     2

[Matt J]

BTW, you are running ndims in a manner that will always give you "2" as a results, even when it is not true. E.g.,

>> img_out=rand(3,3,3);
>> ndims img_out

ans =

       2

[vidya]

oh ..how do i solve it now sir

Answer 1

[Matt J]

gb is too big to fit inside img_out(:,:,1). The former is 71x71 while the latter is 3x3.

[vidya]

oh...how do i solve it now sir..

[Matt J]

Change the matrices to the correct size.